00469nam a2200133Ia 4500008004100000082001500041100001500056245011300071260003300184300001300217600003400230600003500264650003600299140224s9999    xx            000 0 und d  a519.:63 M4  aFrance, J.  aMathematical models in agriculture; a quantitative approach to problems in agriculture and related sciences/  aLondonbButterworthscc 1984  axi,335p.  a J.France and J.H.M.Thornley.  aThornley, J.H.M., joint author  aAgriculture-Mathematical models